Mechanical jointure



June 13, 1939. B. RosENBAUM MECHANICAL JOINTURE Filed Sept. 18, 1957 BY@l2/Www ATTORNEY Patented `lune 13, 1939 UNITED ISfrlx'rrzs PATENTOFFICE MECHANICAL JOINTURE Y Benjamin Rosenbaum, New York, N. Y.Application September 18, 1937, Serial No. 164,604

Y 15 Claims. (Cl. 189-36) The present invention relates to animprovement in mechanical joints, which are especially adapted for usein rigid or knock-,down framing, such as may be-used for erectingportable trucks, and rolling racks such as may be used in clothingfactories, wherein several dozen suits or dresses may be transported ona single rack.

Other uses will be suggested by a study of the present improvement, suchas making portable or permanent scaffolding or framing or the like.

Modifications may be made in the structures herein disclosed, withoutdeparting `from the spirit hereof, or the scope of the appended claims.

In thev drawing,

Fig. 1 is a perspective view, in part fragmentary, of a preferred formof the present improvement;

Fig. 2 is an end View of Fig. 1

Fig. 3 is a sectional view taken on the line 3--3, Fig. 2, looking inthe direction of the arrows;

Fig. 4 is a partially sectioned View of a modied form of jointure;

Fig. 5 is a fragmented side View of the end of a tubular or cylindricallocking extension; and

Fig. 6 is a similar front view of the extension of Fig. 5.

The jointure herein is comprised of only a few simple, coacting parts,and as will be hereinafter ascertained is easily erected, or takenapart, and forms when erected, an extremely rigid joint. While thepresent structures are all shown as forming right angled jointures butit is obvious from the showing herein that the jointures may be arrangedto form angles less than'right'angles if so desired, relative to thebase portion I, thus to form diagonal bracing, in some instances.

As disclosed in Fig. l, the jointure comprises generally, an anchoringbase piece I, made, preferably of a piece of stock channel iron. Theopposed legs I-I are provided with two alined, spaced apart sets ofbores, Figs. 1 and 2, into which tubular struts or braces 2 and 3,broken for convenience, are introduced in parallel position. Thesemembers 2 and 3 may extend through the base as shown, or may have theirends ilush with either leg I-I, and form, when locked in operativeposition, struts, braces or extensions, connected to other coactingsimilar lock joints ,j which may be all conjointly used to form thedesired structure, when erected.

As a means for locking the strut pieces 2 and 3 in the positions shown,the web W of the channel base I is provided with a bore d, which, aswill be noted in Fig. 3, is located at right angles to and centrallyabove the bores a-b and the struts 2 and 3, and midway between the websI-I, as disclosed in Fig. 2. Thus, the bores a-b, a-b and d aresymmetrically disposed to each other. The parallel bores a-b and a'-b inthe legs I-I may be longitudinally spaced from each other about adistance, of at least equal to one quarter of the diameter of saidbores, and up to, in some instances, equal to, at the most, threequarters of the dimension of said bores. There must be a space betweenthe struts 2 and 3, as shown in Fig. 3.

Into the bore d is introduced a tubular, cylindrical lock or strut tube4, the end of which, as noted in Figs. 3, 5 and 6 is pinched, orslightly flattened, to flare the end I0 as in Fig. 6, and to form awedge shaped end, as at I0, Fig. 5. The end ID is not entirely closedbut is left open to receive therein a threaded bolt or screw l having acountersunk head 8 thereon, the angle of whichY coincides with theinterior angle of the seat S of the pinched tube end It. The lowerthreaded end of screw l extends down beyond the diameters oi the struts2 and 3 when in operative position, as disclosed in Fig. 3, anda metalclamping strap 5, bored to receive the extended threaded end of screw land through which the outer threaded end extends, and upon which outerend is tightly screwed a nut 6, which binds the assembled structureiirmly together. The wedge end Il) is forced downwardly into the spacebetween the struts 2 and 3, causing them to oppositely press against thebores a-b, and thus rmly lock'. the struts in immovable positiontherein.

A slightly modified form of the instant jointure is shown in Fig. 4, inwhich all of the elements disclosed in Fig. 1 are used, and bear thesame indices, but the struts 2 and 3 are laid longitudinally against theinside surfaces of the legs I '--I and the assembly locked as describedfor Fig. 3. The legs I-I are unbored, and the web W is bored asdescribed for the other gures.

To release any of the assemblies herein, it is only necessary to unscrewthe nut 6, and the jointure may then be taken apart.

By the present structure, complete units mayy be shipped, knocked down,to save shipping space, and may thereafter be erected at the location ofuse, for permanent or temporary use.

What is claimed is:

1. A jointure comprising a base having a bore, spaced strut piecessupported in said base in parallel positions therein, a wedge endedstrut passing through said bore and having its wedge fr end in contactbetween said first struts and means out of contact with the base fordrawing said Vwedge ended strut and said first struts together.

. 2. A jointure as set forth in claim 1, in which the base is formed ofa section of` channel iron,

the legs of which base spacedly support said spaced struts in operativeposition.

3. A jointure as set forth in claim 1, in which all of the said strutsare tubular.

4. A jointure comprising a channel iron section having a bore in itsweb, the legs of said section being eachprovided with spaced bores, Ythebores of each leg being alined with the bores of the opposite leg, aytubular strut located in each pair of opposed bores, a wedge endedrtubular strut passing through said first named bore and having its wedgeend in wedging contact beclamp plate on said rst struts said threadedstem protruding through said plate and a threaded nut tightly screwedagainst said clamp plate thereby to draw the wedge ended strut intowedging contact with said rst struts.

6. A knock-down frame jointure structure com` prising a base; a strutpiece supported on the base; a wedge ended frame strut having its wedgeend engaged against said piece; and means for drawing the wedge end intowedging contact with said piece.

7. A jointure comprising a base; apiece supr ported on theV base; astrut having a tapered end Y hollow wedge end engaged against saidpiece;

portion engaging against said piece; and means for drawing said endportion into wedging con- .:tact with said piece; parts of the thickestpart of the strut being much more remote from said base than saidtapered portion.

8. A jointure comprising a" base; a strut pieceV supported on the base;a tubular strut having a Vtapered end engaged against said piece; and

means engaged in said end for drawing said end into wedging contact withsaid piece.

9. A jointure comprising a base; a strut `piece supported on the base; atubular strut having a and means for drawing the wedge end into Wedgding contact with said piece.

10. A jointure comprising a base; spaced strut pieces supported on thebase; a wedge ended tubular strut having its wedge end engaging betweenand against both of said pieces; and means for drawing the wedge endinto wedging contact with said pieces.

l1. A jointure comprising a base; spaced strut pieces supported on thebase; a 4strut having a tapered end engaging between said pieces;` 'andmeans for drawing said end into wedging contact with said pieces; thethicker part of the strut being extended a remote distance from thebase.

12. A kjointure comprising a base having an opening therein; spacedstrut pieces supported on the base; a strut having a tapered end engagedbetween said pieces; and means for drawing said end into wedging contactwith said pieces; the thickest part of the strut near said base beingdisposed in said opening.

13. A jointure comprising a base having an opening; spaced strutpiecesvsupported on the base; a tubular strut having a tapered endengaged between said pieces; and means engaged g in said end for drawingthe wedge end into wedging contact with said pieces.

14. A jointure comprising al channel iron section having a web and legs,each leg being provided with a pair of bores; a pair of strut pieces,

each disposed in Vbores of the respective legs;

a tubular strut having a tapered end engaged against the strut pieces; aperforate clamp plate engaged on said pieces at the side most remotefrom said strut; and a headed screw having its head engaged in thetapered end and its threaded portion passed through the perforation ofthe plate; and a clamping nut on the threaded portion and engagedagainst the plate.

15. A jointure comprising a channel iron section having a web having abore therein and legs, each provided with a pair of bores, the bores ofone leg being alined with the bores of the other leg; a pair of strutpieces in the alined bores respectively; a tubular strut in the bore ofthe web and having an end flattened to approximate web form and engagedagainst the strut pieces;

a perforate clamp plate engaged on said pieces at Athe sidemostremotefrom the web; and a headed screw having its. head engaged in the jflattened portion, and its threaded portion passed through theperforation of the plate; and a clamping nut on the threaded portion andenplate.

